Excavating apparatus



June 2., 1931. C, 0, HANSON 1,808,409

EXCAVATING APPARATUS Original Filed Deo. 21, 1927 5 Sheets-Sheet l .WWI

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OO O 0 June 2, 1931. c. o. HANSON A EXCAVATING APPARATUS Original Filed Dec. 21, 1927 5 Sheets-Sheet 2 June 2, 1931. c. o. HANsoN 1,808,409

EXCAVATING APPARITUS Original Filed Dec, 21.1927 5 Sheets-Sheet 3 June 2, 1931. c. o. HANsoN EXCAVATING APPARATUS Original Filed Dec. 21, 1927 5 Sheets-Sheet 4 June 2, 1931. C HANSON 1,808,409

EXCAVATING APPARATUS Original Filed Dec. 21. 1927 5 Sheets-Sheet 5 Patented June 2, 1931 :PATENr OFFICE CLIFFORD o. HANsoN, or Turm, omo

EXCAVATING APPARATUS )Original application :bled December 21, 1927, Serial No. 241,567. Divided and this applicationb -ifa-d November 4, 1929.

This is a divisional applicationv of my application, Serial No. 241,567,1iled December 21, 1927, covering excavating apparatus.

This invention relates to improvements in excavating apparatus, and, more especially, a portable device adapted to travel under its own power. I have here shown my invention as embodied in that type of device having a boom with a dipper or shovel mounted thereon. v

.Amon the features of my invention is the improve mounting or setting of the motor in the cab permitting the use of a standard tractor or automobile internal combustion motor. In the use of such a motor, the regular tractor transmission is used from the main motor shaft,'but the back axle with its differential is removed and a solid drive shait with a driving gear substituted. The motor isso mounted that it may drive the hoisting drum on one side and the propel, crowd, and swing motions of the machine through a trainv of' gears on the other side. There is also 4improved mechanism for transmitting the drive for the swing from the motor to the ring gear mounted on the chassis of the device.

- Another feature of my invention is the imroved construction of mechanism for crowdlng the dipper stick. y Another feature of my invention is the improved method. of and mechanism :for steering the machine. vThis mechanism is so conv structed that in the forward travel ofthe may chine, it may be easily and readily steered by swingin or turnin the cab to one side or the other'. or examp e, swinging the cab to the -right causes the machine tov turn tothe right,

and vice versa. y

Another feature of my invention is the improved back-stop mechanism which revents the machine from being pushed bac ardly during the digging o ration.

Other features an advantages of my invention will a pear more fully as I proceed with my spec' cation.

In that form of device embodying the features of my invention shown in the accompapqying drawings i 1 e 1 isa viewin side elevation v Fi 2 'y is a view taken indicated by line 2, of ig.

Serial No. 404,674.

1 ;Fig. 3 is a view taken as indicated'by line 3 of Fig. 1; Fig. Liis a view taken as indicated by line 4 of Fig. 1; Fig. 5 is a view taken as indicated b line 5 of Fig.-1; Fig. 6 is a view taken as in icated by line 6 of Fig. 5; Fig. 7 is a view in perspective of one of the sprockets on the rear tread shaft showing the ratchet constituting a part of the back-stop mechanism; Fig. 8 is a view'taken as indicated by line'S of Fig. 7; and Fig. 9 is a horizontal sectional view of a part ofl the apparatus showing the swing mechanism, taken as indicated by the line 9 of Fig. 1. i

drawings, the 'device com- As shown in the prises a cab 10 rotatably mounted on a chassis 11 supported on crawler treads 12, in the'usual manner. dipper boom pivotally supportedl at 14, in the usual manner, and adapted to be raised or lowered by means of the rope 15 tied to its Aouter end and wound over a winch 16 controlled in the ordinary manner by means of the crank 17. 18 indicates the usual dipper or shovel carried by the dipper stick or handle 19 inthe usual manner.

Motor mounting drive mechanisms My invention comprises the use of a standard tractor or automobile internal combustion motor which, for example, may be a 'Fordsonor a McCormick-Deering motor.

Obviously, however, other types of motors may be used. The motor is indicated in generalby 20, and its forward end may be supported on the stand 21, the rear end may be supported in any suitable manner as, for example, on thecasting 22. I t is to be Yunderstood that the motor is vmounted in the cab 10 with the stands 21 and 22 supported on the lfloor 10" of the cab. n the useof the motor 20, the regular transmission is retained, except that the two-piece drive shaft with the differential is removed and a solid Numeral 13 indicates the shovel or drive shaft 23 substituted with a driving gear M. These parts are shown in Fig. 2,

where 20 indicates the regular diierential housing'of the standard motor that is used.

@Mounted on the right hand'end of the driv ing-sliaft23-is a hoistingdrum-25 controlling the iol-frnning over the wheel 27 at the end of the arm 13 and attached to the dipper 18. The hoisting drum 25 is controlled in the usual manner by means of a clutch 28 which, in turn, is operated by the clutch control rod 29. 30 indicates a suitable brake for retardingmovement of the hoisting drum in unwinding.

The left hand end of the drive shaft 23 carries a main drive pinion 31 adapted to operate an intermediate gear 32 which, in turn, drives the gear 33 on the upper propel shaft 34. 'I'he shaft 34 carries av bevel 'gear 35 meshing with a bevel gear 36 on the vertical shaft 37 carrying on its lower end a bevel gear 38 meshing with a bevel gear 39 on the lower propel shaft 40. The axis of the vertical shaft 37 is co-incident with the axis of the pivot on whichY the cab 10 turns so that the turning of the cab does not interfere with the train of gears just described. The ends of the lower propel shaft are mounted in suitable bearings 41 and carry forward drive chain sprockets 42 driving the chains 43 which, in turn, drive the rear chain sprockets 44 on the rear shaft 45. Drive is effected from the shaft 45 to the treads 12 by means of the usual driving sprockets 46. The pinion 31 on the drive shaft 23 operating through the pinions 32 and 33 also drives the pinion 47 on the'crowd shaft 48. The crowd mechanism itself will be described 'more in detail hereinafter.

The gear 31 operating through the gear 32 also drives the intermediate gear 49 on the intermediate shaft 50, provided with a gear 51 (see Fig. 9) driving the gear 52 on the swing'shaft 53. The details of the swing mechanism will be described hereinafter.

Urowd mecicmsm The crowd mechanism( is driven from the crowd shaft 48 and is well shown in Fig. 4. The gear 47 is rotatably mountedon the shaft 48 and carries a clutch element -54 rotating it in one direction. On the other end of the shaft 48 is mounted another reversely rotating clutch element 55 driven by the sprocketA wheel 56 which, in turn, is driven by a chain 5,7 moved by sprockets 58 on the upper propel shaft 34. The shaft 48 carrying sprocket 59 is connected by a chain 60 to the double sprocket 61 which, in turn, drives a chain 62 operating the sprocket 63 on the shaft 64 mounted on the boom 13. The shaft 64 carries the pinions 65 meshing with the rr :kbar 66 on the di per stick 19 to give the crowd movement. fn order to effect the crowd movement in either direction, thel shaft48 carrying the sprocket 59 is provided with clutch elementsV 67 and 68,either one of which is adapted to be engaged with one 'of the clutch elements 54, 55 in the usual mannerby means of the operating rod 69. The details of this clutch mechanism are well known and vneed not be specifically .described here. It will suice to say that movement of the rod 69 to either side, as shown in Fig. 4, will clutch the shaft 48 carrying the sprocket 59 into either one of the clutch elements'54, 55 to rotate the same in the desired direction. The swing mohanism The swing mechanism is shown in Fig. 9.

The swing shaft 53 has rotatably mounted which, in turn, is shifted by means of the bell-crank lever 80 with the forked end 8Oa embracing the pin 81. Thebell-crank 80 is adapted to be shifted by the operating rod 82.

The bevel gears 71 and 72 mesh with the bevel gear 83 on the shaft 84 carrying the pinion 85 (see Fig. 1) on its lower end. The pinion 85 meshes with the ring gear 86 on the chassis so that rotation of the pinion 85 rolls the same around the ring gear 86 to swing the cab.

The steerz'ng mckam'sm The drive to the lower propel shaft 40 has already been explained. This shaft 40 carries the two driving sprockets 42. These driving sprockets, however, are rotatably mounted on the shaft 40 and provided with lugs 42a adapted to be engaged by the n'onrotatable jaw clutches'90 (See Fig. 5). The clutches 90 are normally held in engagement with the sprockets by means of the spring 91. The jaw clutches are provided with peripheral grooves 92 engaged by the arms 93 on the end of the pivoted lever 94. The lever 94 is pivoted at 94. The forward ends of `levers 94 are provided with holes through Lis adapted to be rotated bythe operating bar r 101 attached tothe arm 102. When the pin 98 is lowered in the socket 97, as shown in Fig. 6, rotation of the cab to the right or the left will slide the bar 95 to the right or the left to' throw out either thefright or left clutch 90. When one of the clutches 90 is thrown out, the corresponding sprocket will cease to revolve, causing the excavator to turn to that direction. When the cab is in center, both clutches willbe engaged, as shown in Fig. 5, and the excavator will travel straightahead.

The back-letal) mechanism The back-stop mechanism is shown in Fi l. 7 and 8. 44 indicates the drive chain sproc y. et which is provided with openings 44a between the spokes 44". 110 indicates a casting fitting over the hub 44 of the sprocket and carrying a spring pressed ratchet pin 111 adapted to work inthe holes 44". This pin 111 is pressed toward the sprocket by means of the spring 112. The end of the pin is beveled, as indicated by 111, to engage the spokes 44" to permit the sprocket to turn in one direction but prevent reverse rotation. l5 In this way,` the excavator is permitted to move ahead but is prevented from backing as the dipper is operated. If desired, the pin lill-can be turned over` by means of the arm 113 so that reverse movement of the excavator is permitted, butforward movement prevented. i

While I have shown and described certain embodiments of my invention, it is to be understood thatit is capable of many modifica- 25 tions. Ghanges, therefore, in the construction and arrangement may be made without departing from the spirit4 and'sco e of the invention as disclosed in the appen ed claim, in which it is my intention to claim all nov# so elty inherent in my invention as broadly as possible,,in view of the prior art.

What I regard as new, and desire to secure by Letters Patent, is: J 1

' In an excavator of the character described; .a chassis mounted on traction members, a platform rotatably mounted on the chassis; a motor mounted on the pfatform;y disengage# able drive connections between Ithe motor and traction members on both sides of the chassls, including clutches normally in engagement; a cross-shaft slidably mounted 'on the chassis; connections between said cross-'shaft A and the clutches whereby shifting to either f. side will disengage the corresponding clutch; means for rotating the platform on the chassis; and means for shifting the cross-shaft by rotating the platform, said means including a part on the shaft and a part on the platform, said parts adapted to be moved so they 5 will engage upon rotation of the platform. l

v In witness whereof, I have hereunto set my hand this 31st day of October, 1929.

CL/IEFORD O. HAN SON. 

